<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div>
        <a href="#">awd</a>
    </div>
    <script>
        var a = document.querySelector("a");
        a.addEventListener("click", function(e) {
            //阻止链接跳转
            e.preventDefault();
        })
    </script>
</body>

</html>